San Francisco December 21 Weather Records

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	62	53	0.00	n/a
2022	57	45	0.00	n/a
2021	53	44	0.16	n/a
2020	59	46	0.00	n/a
2019	61	50	0.00	n/a
2018	58	53	0.09	n/a
2017	56	46	0.00	n/a
2016	63	48	0.00	n/a
2015	58	50	1.30	n/a
2014	62	57	0.06	n/a
2013	58	45	0.00	n/a
2012	56	51	0.23	0.0
2011	59	44	0.00	0.0
2010	58	48	0.11	0.0
2009	58	49	0.16	n/a
2008	53	45	0.57	n/a
2007	54	43	0.00	n/a
2006	51	46	0.67	n/a
2005	67	55	0.71	n/a
2004	69	43	0.00	n/a
2003	60	50	0.00	n/a
2002	57	48	0.11	n/a
2001	57	46	0.02	n/a
2000	57	49	0.03	n/a
1999	70	53	0.00	n/a
1998	46	34	0.00	0.0
1997	59	46	0.00	n/a
1996	54	50	1.87	n/a
1995	57	45	0.00	n/a
1994	55	43	0.00	n/a
1993	50	37	0.00	n/a
1992	57	47	0.00	n/a
1991	58	43	0.00	n/a
1990	42	30	0.00	n/a
1989	56	42	0.00	n/a
1988	54	42	0.15	n/a
1987	54	46	0.05	n/a
1986	55	45	0.00	n/a
1985	54	41	0.00	n/a
1984	56	43	0.00	n/a
1983	50	44	0.02	n/a
1982	57	50	0.81	n/a
1981	61	53	0.03	n/a
1980	57	51	0.79	n/a
1979	57	50	0.00	n/a
1978	56	43	0.00	n/a
1977	62	52	0.00	n/a
1976	58	47	0.00	n/a
1975	56	45	0.13	n/a
1974	55	44	0.02	n/a
1973	60	49	0.55	n/a
1972	57	51	0.00	0.0
1971	52	42	0.20	0.0
1970	53	45	0.10	0.0
1969	64	52	0.66	0.0
1968	47	38	0.00	0.0
1967	50	42	0.00	0.0
1966	53	43	0.00	0.0
1965	47	35	0.00	0.0
1964	63	58	0.65	0.0
1963	53	43	0.00	0.0
1962	57	47	0.00	0.0
1961	61	51	0.02	0.0
1960	53	46	0.00	0.0
1959	58	47	0.00	0.0
1958	56	51	0.51	0.0
1957	57	49	0.28	0.0
1956	57	42	0.00	0.0
1955	62	57	1.12	0.0
1954	47	38	0.00	0.0
1953	64	48	0.00	0.0
1952	58	44	0.00	0.0
1951	53	41	0.00	0.0
1950	55	50	0.00	0.0
1949	53	40	0.00	0.0
1948	53	42	0.00	0.0
1947	58	49	0.00	0.0
1946	50	42	0.00	0.0
1945	61	54	1.41	0.0
1944	60	55	0.02	0.0
1943	57	48	0.00	0.0
1942	49	43	0.00	0.0
1941	54	46	0.12	0.0
1940	58	54	1.01	0.0
1939	63	48	0.00	0.0
1938	59	44	0.00	0.0
1937	59	47	0.00	0.0
1936	58	50	0.00	0.0
1935	60	45	0.00	0.0
1934	52	43	0.00	0.0
1933	52	44	0.00	0.0
1932	53	43	0.34	0.0
1931	55	47	0.20	0.0
1930	55	45	0.00	0.0
1929	59	51	0.00	0.0
1928	55	42	0.00	0.0
1927	55	47	0.00	0.0
1926	51	43	0.13	0.0
1925	54	47	0.00	0.0
1924	46	43	2.85	0.0
1923	57	44	0.00	0.0
1922	60	46	0.00	0.0
1921	56	47	0.93	0.0

What's the all-time high for San Francisco on 12/21?

For the date of Dec 21, the highest temperature ever reached in San Francisco history is 70 °F which happened in 1999.

Highest Temperatures in San Francisco on December 21

Rank	Temperature	Year
1	70 °F	1999
2	69 °F	2004
3	67 °F	2005
4	64 °F	1969
4	64 °F	1953
6	63 °F	1939
6	63 °F	2016
6	63 °F	1964
9	62 °F	2014
9	62 °F	2023
9	62 °F	1977
9	62 °F	1955

What's the all-time low for San Francisco on 12/21?

For the date of Dec 21, the lowest temperature ever reached in San Francisco history is 30 °F which happened in 1990.

Lowest Temperatures in San Francisco on December 21

Rank	Temperature	Year
1	30 °F	1990
2	34 °F	1998
3	35 °F	1965
4	37 °F	1993
5	38 °F	1954
5	38 °F	1968
7	40 °F	1949
8	41 °F	1985
8	41 °F	1951
10	42 °F	1948
10	42 °F	1956
10	42 °F	1967
10	42 °F	1946
10	42 °F	1988
10	42 °F	1971
10	42 °F	1928
10	42 °F	1989

Lowest High Temperatures in San Francisco on December 21

Rank	Temperature	Year
1	42 °F	1990
2	46 °F	1924
2	46 °F	1998
4	47 °F	1965
4	47 °F	1954
4	47 °F	1968
7	49 °F	1942
8	50 °F	1983
8	50 °F	1946
8	50 °F	1967
8	50 °F	1993

What's the most it has ever rained in San Francisco on 12/21?

For the date of Dec 21, the most precipitation ever recorded in San Francisco history is 2.85 inches which happened in 1924.

All-Time Most Precipitation in San Francisco on December 21

Rank	Precipitation	Year
1	2.85 inches	1924
2	1.87 inches	1996
3	1.41 inches	1945
4	1.30 inches	2015
5	1.12 inches	1955
6	1.01 inches	1940
7	0.93 inches	1921
8	0.81 inches	1982
9	0.79 inches	1980
10	0.71 inches	2005

Weather Station Details

Years	Station	Coordinates
1921–2024	Downtown San Francisco	location